Three ladies have lunch at a restaurant. When they are finished, the waiter tells them the bill comes to $30. They each hand him a ten dollar bill. When he brings the money to into the kitchen, the restaurant owner tells him that he made a mistake: The bill should only come to $25 and the owner hands him five singles. On the way to the table, the waiter realizes that he cannot divide five singles three, even ways, so he decides to pocket $2 and he gives each of the three ladies a one dollar bill. So now, each lady has paid $9, which comes to 3 x $9 = $27 and the waiter has $2. Twenty-seven plus two comes to $29, but there was originally $30. What happened to the extra dollar?